Here is the full list of all 50 Just Cause 2 achievements. It takes around 50-60 hours to unlock all of the achievements on Windows.
Complete 49 faction missions.
Reach 75% completion in the normal mode or mercenary mode.
Complete 50 challenges.
Assassinate 25 colonels.
Collect 150 faction items.
Kill 5 enemies by smashing them with an object tethered to your vehicle with the grappling hook.
Reach 50% completion in the normal mode or mercenary mode.
Collect 1000 resource items.
Reach 100% complete in 100 locations.
Complete 1000 sabotages.
Drive all 104 vehicles.
Discover 100 locations.
Hijack 50 enemy vehicles.
Fly an airplane under 30 unique bridges in Panau.
Stand on foot at the highest point of Panau.
Get 100 stunt driver points.
Kill 30 enemies by mowing them down with vehicles.
Bonus for completing the game on normal difficulty.
Bonus for completing the game on hard difficulty. Also gives you the bonus for normal difficulty.
Bonus for completing the game on extreme difficulty. Also gives you the bonus for hard and normal difficulties.
Complete story mission 7.
Complete story mission 6.
Complete 10 challenges.
Travel 75 kilometers by land vehicle.
Complete story mission 5.
Complete 9 stronghold takeovers.
Kill 750 enemies.
Complete story mission 4.
Reach 100% complete in 15 locations.
Kill 30 enemies by using the grappling hook and making them fall to their death.
Complete 100 sabotages.
Fly an airplane close to the ground for 30 seconds.
Kill 5 enemies by dragging them behind a vehicle with the grappling hook.
Complete 3 stronghold takeovers.
Kill 30 enemies while they're suspended in the air with the grappling hook.
Complete story mission 3.
Kill 20 enemies in 60 seconds.
Drive 30 different vehicles.
Kill 30 enemies while they're falling through the air.
Kill 50 enemies using melee attacks.
Base jump 1000 meters.
Open the parachute and then land on foot 300 meters above the starting height.
Collect 100 resource items.
Kill 50 enemies with headshots.
Kill 5 enemies with the melee attack while they're suspended with the grappling hook.
Kill 50 enemies in a row with inventory weapons without losing health.
Complete story mission 2.
Complete story mission 1.
Destroy 30 objects in 60 seconds.
Cause chaos for the first time.